My 2002 Dodge RAM 1500 was shifting hard when slowing down, I was going around 65 and when the truck was slowing down the car started to shift down hard in a jolting manner, I also got a P0121 error and an engine light that indicates an issue with the Throttle Positioning Sensor. If I put the car in 2nd, its ok but if in drive, thats when I feel the problem. If I change out TPS, will this resolve the problem?